kernel/arch/ia64/include/asm/paravirt.h

   1 /******************************************************************************
   2  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
   3  *                    VA Linux Systems Japan K.K.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21
  22 #ifndef __ASM_PARAVIRT_H
  23 #define __ASM_PARAVIRT_H
  24
  25 #ifndef __ASSEMBLY__
  26 /******************************************************************************
  27  * fsys related addresses
  28  */
  29 struct pv_fsys_data {
  30         unsigned long *fsyscall_table;
  31         void *fsys_bubble_down;
  32 };
  33
  34 extern struct pv_fsys_data pv_fsys_data;
  35
  36 unsigned long *paravirt_get_fsyscall_table(void);
  37 char *paravirt_get_fsys_bubble_down(void);
  38
  39 /******************************************************************************
  40  * patchlist addresses for gate page
  41  */
  42 enum pv_gate_patchlist {
  43         PV_GATE_START_FSYSCALL,
  44         PV_GATE_END_FSYSCALL,
  45
  46         PV_GATE_START_BRL_FSYS_BUBBLE_DOWN,
  47         PV_GATE_END_BRL_FSYS_BUBBLE_DOWN,
  48
  49         PV_GATE_START_VTOP,
  50         PV_GATE_END_VTOP,
  51
  52         PV_GATE_START_MCKINLEY_E9,
  53         PV_GATE_END_MCKINLEY_E9,
  54 };
  55
  56 struct pv_patchdata {
  57         unsigned long start_fsyscall_patchlist;
  58         unsigned long end_fsyscall_patchlist;
  59         unsigned long start_brl_fsys_bubble_down_patchlist;
  60         unsigned long end_brl_fsys_bubble_down_patchlist;
  61         unsigned long start_vtop_patchlist;
  62         unsigned long end_vtop_patchlist;
  63         unsigned long start_mckinley_e9_patchlist;
  64         unsigned long end_mckinley_e9_patchlist;
  65
  66         void *gate_section;
  67 };
  68
  69 extern struct pv_patchdata pv_patchdata;
  70
  71 unsigned long paravirt_get_gate_patchlist(enum pv_gate_patchlist type);
  72 void *paravirt_get_gate_section(void);
  73 #endif
  74
  75 #ifdef CONFIG_PARAVIRT_GUEST
  76
  77 #define PARAVIRT_HYPERVISOR_TYPE_DEFAULT        0
  78
  79 #ifndef __ASSEMBLY__
  80
  81 #include <asm/hw_irq.h>
  82 #include <asm/meminit.h>
  83
  84 /******************************************************************************
  85  * general info
  86  */
  87 struct pv_info {
  88         unsigned int kernel_rpl;
  89         int paravirt_enabled;
  90         const char *name;
  91 };
  92
  93 extern struct pv_info pv_info;
  94
  95 static inline int paravirt_enabled(void)
  96 {
  97         return pv_info.paravirt_enabled;
  98 }
  99
 100 static inline unsigned int get_kernel_rpl(void)
 101 {
 102         return pv_info.kernel_rpl;
 103 }
 104
 105 /******************************************************************************
 106  * initialization hooks.
 107  */
 108 struct rsvd_region;
 109
 110 struct pv_init_ops {
 111         void (*banner)(void);
 112
 113         int (*reserve_memory)(struct rsvd_region *region);
 114
 115         void (*arch_setup_early)(void);
 116         void (*arch_setup_console)(char **cmdline_p);
 117         int (*arch_setup_nomca)(void);
 118
 119         void (*post_smp_prepare_boot_cpu)(void);
 120
 121 #ifdef ASM_SUPPORTED
 122         unsigned long (*patch_bundle)(void *sbundle, void *ebundle,
 123                                       unsigned long type);
 124         unsigned long (*patch_inst)(unsigned long stag, unsigned long etag,
 125                                     unsigned long type);
 126 #endif
 127         void (*patch_branch)(unsigned long tag, unsigned long type);
 128 };
 129
 130 extern struct pv_init_ops pv_init_ops;
 131
 132 static inline void paravirt_banner(void)
 133 {
 134         if (pv_init_ops.banner)
 135                 pv_init_ops.banner();
 136 }
 137
 138 static inline int paravirt_reserve_memory(struct rsvd_region *region)
 139 {
 140         if (pv_init_ops.reserve_memory)
 141                 return pv_init_ops.reserve_memory(region);
 142         return 0;
 143 }
 144
 145 static inline void paravirt_arch_setup_early(void)
 146 {
 147         if (pv_init_ops.arch_setup_early)
 148                 pv_init_ops.arch_setup_early();
 149 }
 150
 151 static inline void paravirt_arch_setup_console(char **cmdline_p)
 152 {
 153         if (pv_init_ops.arch_setup_console)
 154                 pv_init_ops.arch_setup_console(cmdline_p);
 155 }
 156
 157 static inline int paravirt_arch_setup_nomca(void)
 158 {
 159         if (pv_init_ops.arch_setup_nomca)
 160                 return pv_init_ops.arch_setup_nomca();
 161         return 0;
 162 }
 163
 164 static inline void paravirt_post_smp_prepare_boot_cpu(void)
 165 {
 166         if (pv_init_ops.post_smp_prepare_boot_cpu)
 167                 pv_init_ops.post_smp_prepare_boot_cpu();
 168 }
 169
 170 /******************************************************************************
 171  * replacement of iosapic operations.
 172  */
 173
 174 struct pv_iosapic_ops {
 175         void (*pcat_compat_init)(void);
 176
 177         struct irq_chip *(*__get_irq_chip)(unsigned long trigger);
 178
 179         unsigned int (*__read)(char __iomem *iosapic, unsigned int reg);
 180         void (*__write)(char __iomem *iosapic, unsigned int reg, u32 val);
 181 };
 182
 183 extern struct pv_iosapic_ops pv_iosapic_ops;
 184
 185 static inline void
 186 iosapic_pcat_compat_init(void)
 187 {
 188         if (pv_iosapic_ops.pcat_compat_init)
 189                 pv_iosapic_ops.pcat_compat_init();
 190 }
 191
 192 static inline struct irq_chip*
 193 iosapic_get_irq_chip(unsigned long trigger)
 194 {
 195         return pv_iosapic_ops.__get_irq_chip(trigger);
 196 }
 197
 198 static inline unsigned int
 199 __iosapic_read(char __iomem *iosapic, unsigned int reg)
 200 {
 201         return pv_iosapic_ops.__read(iosapic, reg);
 202 }
 203
 204 static inline void
 205 __iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
 206 {
 207         return pv_iosapic_ops.__write(iosapic, reg, val);
 208 }
 209
 210 /******************************************************************************
 211  * replacement of irq operations.
 212  */
 213
 214 struct pv_irq_ops {
 215         void (*register_ipi)(void);
 216
 217         int (*assign_irq_vector)(int irq);
 218         void (*free_irq_vector)(int vector);
 219
 220         void (*register_percpu_irq)(ia64_vector vec,
 221                                     struct irqaction *action);
 222
 223         void (*resend_irq)(unsigned int vector);
 224 };
 225
 226 extern struct pv_irq_ops pv_irq_ops;
 227
 228 static inline void
 229 ia64_register_ipi(void)
 230 {
 231         pv_irq_ops.register_ipi();
 232 }
 233
 234 static inline int
 235 assign_irq_vector(int irq)
 236 {
 237         return pv_irq_ops.assign_irq_vector(irq);
 238 }
 239
 240 static inline void
 241 free_irq_vector(int vector)
 242 {
 243         return pv_irq_ops.free_irq_vector(vector);
 244 }
 245
 246 static inline void
 247 register_percpu_irq(ia64_vector vec, struct irqaction *action)
 248 {
 249         pv_irq_ops.register_percpu_irq(vec, action);
 250 }
 251
 252 static inline void
 253 ia64_resend_irq(unsigned int vector)
 254 {
 255         pv_irq_ops.resend_irq(vector);
 256 }
 257
 258 /******************************************************************************
 259  * replacement of time operations.
 260  */
 261
 262 extern struct itc_jitter_data_t itc_jitter_data;
 263 extern volatile int time_keeper_id;
 264
 265 struct pv_time_ops {
 266         void (*init_missing_ticks_accounting)(int cpu);
 267         int (*do_steal_accounting)(unsigned long *new_itm);
 268
 269         void (*clocksource_resume)(void);
 270
 271         unsigned long long (*sched_clock)(void);
 272 };
 273
 274 extern struct pv_time_ops pv_time_ops;
 275
 276 static inline void
 277 paravirt_init_missing_ticks_accounting(int cpu)
 278 {
 279         if (pv_time_ops.init_missing_ticks_accounting)
 280                 pv_time_ops.init_missing_ticks_accounting(cpu);
 281 }
 282
 283 struct static_key;
 284 extern struct static_key paravirt_steal_enabled;
 285 extern struct static_key paravirt_steal_rq_enabled;
 286
 287 static inline int
 288 paravirt_do_steal_accounting(unsigned long *new_itm)
 289 {
 290         return pv_time_ops.do_steal_accounting(new_itm);
 291 }
 292
 293 static inline unsigned long long paravirt_sched_clock(void)
 294 {
 295         return pv_time_ops.sched_clock();
 296 }
 297
 298 #endif /* !__ASSEMBLY__ */
 299
 300 #else
 301 /* fallback for native case */
 302
 303 #ifndef __ASSEMBLY__
 304
 305 #define paravirt_banner()                               do { } while (0)
 306 #define paravirt_reserve_memory(region)                 0
 307
 308 #define paravirt_arch_setup_early()                     do { } while (0)
 309 #define paravirt_arch_setup_console(cmdline_p)          do { } while (0)
 310 #define paravirt_arch_setup_nomca()                     0
 311 #define paravirt_post_smp_prepare_boot_cpu()            do { } while (0)
 312
 313 #define paravirt_init_missing_ticks_accounting(cpu)     do { } while (0)
 314 #define paravirt_do_steal_accounting(new_itm)           0
 315
 316 #endif /* __ASSEMBLY__ */
 317
 318
 319 #endif /* CONFIG_PARAVIRT_GUEST */
 320
 321 #endif /* __ASM_PARAVIRT_H */